perf: RISC-V: store available counter mask as bitmap

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97587
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:09 UTC
Updated2026-09-25 11:17:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: perf: RISC-V: store available counter mask as bitmap The available-counter mask was a single unsigned long, but iteration uses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object. Filling with an unsigned-long bit at index 32 and above is also wrong. Use DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word into CFG_MATCH when checking events, when allocating an index, and when stopping all counters. Set the counter base to i times BITS_PER_LONG. Share the CFG_MATCH ecall through a small helper so the 32-bit argument split is not duplicated. On qemu-system-riscv32 the probe bitmap has bits above XLEN set, so the first word alone is not enough. [[email protected]: updated to apply; fixed checkpatch.pl issues]

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e9991434596f5373dfd75857b445eb92a9253c56 143668c424772979a45118dc9cc9c2c13a35f41d git Not specified
CNA Linux Linux affected e9991434596f5373dfd75857b445eb92a9253c56 9bec7beaed074bcae4181fde9ff9dfbe4e7b0957 git Not specified
CNA Linux Linux affected e9991434596f5373dfd75857b445eb92a9253c56 e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb git Not specified
CNA Linux Linux affected e9991434596f5373dfd75857b445eb92a9253c56 6809da6e9c08ccc9a09cb0a48c61471679274aaa git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9bec7beaed074bcae4181fde9ff9dfbe4e7b0957 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/143668c424772979a45118dc9cc9c2c13a35f41d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6809da6e9c08ccc9a09cb0a48c61471679274aaa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report